Adding or subtracting the same number

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Yi Chuan Xie
Yi Chuan Xie 2020-10-31
回答： Vladimir Sovkov 2020-10-31
Hi, I have a array, for example, [0 0 0 0 ]
And I want each of them to be randomly adding 0.4 or subtracting 0.4
How do I do that?

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回答（1 个）

Vladimir Sovkov
Vladimir Sovkov 2020-10-31
n=4; % array length
x=zeros(1,n); % sample array
d=0.4; % value to be added/subtracted
k=rand(1,n); % uniformly random number between 0 and 1
x(k<0.5)=x(k<0.5)-d; % subtraction
x(k>=0.5)=x(k>=0.5)+d; % addition
many other ways are possible

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